I have a Wester Digital 1 TB Ethernet connected drive on my network. When I plug it into the network I can get an IP from my Cisco Router and/or my Cisco 3560G switch. But when I try to put it on the same network as my LinuxMCE, it receives an IP, but you can't ping it. Linuxmce DHCP shows it handing out a lease to the proper MAC, but it's the "actual" mac. I noticed, Cisco puts a 01 at the beginning and it works fine.